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angoline [Supplementary Concept]
structure in first source
Date introduced: August 31, 1998
Phenanthridines
Year introduced: 1969
Heterocyclic Compounds, 3-Ring
A class of heterocyclic compounds that include a three-ring fused structure. Both aromatic or non-aromatic ring structures are included in this category.
Year introduced: 1998
Heterocyclic Compounds
Cyclic compounds that include atoms other than carbon in their ring structure.
Heterocyclic Compounds, Fused-Ring
Multiple ring heterocyclic compounds containing two or more rings that share two atoms and one bond in common.
Year introduced: 2017